The specific target of this research is finding out an ideal composition of wood palm oil particle and polystyrene in standard particle board. Indonesian standard of SNI 03-2105-1996 used for reference of test result. The experiment started by screening of particle, mixing, forming of particle board, and test. Forming elements are wood palm oil particle, PS, benzoyl peroxide, maleated coupling agent, and xilena. The compositions of mass fraction KKS-PS: 20:80, 30:70, 40:60, 50:50, 60:40, 70:30 and 80:20. Testing was performed mechanical, physical and fraktografi analysis. Results of mechanical and physical test show that particle board characteristics increase due to the increase of adhesive concentration. From the variation of composition, starting composition of KKS-PS, 60:40 has been used in the manufacture of particle board KKS. Tensile strength and flexural strength optimum of particle board KKS-PS is 55.15 kg/cm2 and 92.27 kg/cm2. The particle board wood palm oil with adhesive polystyrene fulfilled the acceptable Indonesian standard of SNI 03-2105-1996